MCQ
Study of fossils is:
- ✓Palaeontology.
- BHerpetology.
- CSaurology.
- DOrganic evolution.
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$(I)$ Compound epithelium is made of multi layered of cells.
$(II)$ Limited role in secretion and absorption.
$(III)$ To provide protection against chemical and mechanical stresses.
$(IV)$ It present in $PCT$.
| Column-$I$ | Column-$II$ |
| $A$. Tonoplast | $I$. Contain digestive enzyme |
| $B$. Contractile vacuole | $II$. Store metabolic gases |
| $C$. Food vacuole | $III$. Excretion |
| $D$. Air vacuole | $IV$. Transport of ions in plants |
|
Column $-I$ |
Column $-II$ |
|
$a.$ Yellow to yellow orange |
$1.$ Chlorophyll $-a$ |
|
$b.$ Green |
$2.$ Xanthophyll |
|
$c.$ Yellow |
$3.$ Carotenoids |
$II.$ Tracheids/vessels elements are larger during periods when water is abundant
$III.$ Tracheids/vessels elements have thicker wall during periods of water deprivation
$IV.$ Wood formed in the previous years is darker than newer wood
Select the combination of correct statements from the options given below